That will depend a lot on how long Suvorov is going to live: when he died OTL in 1800, he was already 70 and that's pretty old for the time. If we assume he lives long enough to see the end of the Napoleonic Wars (1815 OTL), he has to live up to the age of 85, which is possible but hard. Plus, with Suvorov getting older and older, he might be asked to retire because of his old age at one point, even if he is looked as the best generial of the Russian Army. Another thing that plays against him is that Suvorov was a former favorite of Catherine II and Paul I wanted to get rid of all of them.
Assuming Suvorov manages to stay alive and in command for all the lenght of the Napoleonic Wars though, the results could be intringuing. Franco-Russian fighting during the Napoleonic Wars is going to be interesting with the French and Russians both having a military genius on their side. I'm not sure it would buttefly Austerlitz (though it could alter it in a less disastrous result for the Austro-Russian army) but the Polish Campaign would be interesting: Suvorov might be able to beat Napoleon's Marshall and thus be a nuisance to l'Empereur. I'm less sure Suvorov could beat Napoleon in a direct confrontation though: though Napoleon is younger and has less experience, he would be more cunning and daring than Suvorov. Plus, I think Napoleon has more genius than Suvorov although that can be discussed: there was once a poll asking for the result of a Souvorv-Napoleon confrontation and I think it ended in a draw or with Napoleon getting a few more votes only.
Napoleon could also be on his guard if Suvorov remains in Russian service. With such a general on the Russian side, Napoleon might seek to avoid confrontation with Russia for as long as possible and concentrate his efforts on maintaining Tilsit or an ATL equivalent.