Well, he would only be president for a few months, since he died in July of 1953, of cancer I think. So really, we need to figure out who would have been his running mate.
I seem to recall that the James Patterson biography of Taft, "Mr. Republican" implies that Taft would have gone with Senator William Knowland from California. Such a choice seems plausible.
Knowland is similar to Nixon in a lot of ways, a young Senator from California with a reputation for being a strong anti-Communist. Knowland was also a political ally of Earl Warren, so selecting him could help Taft win over some moderate Republicans. (Knowland is actually deeply conservative, probably more so than Taft even, but I don't think his conservatism was that well known in 1952.)
Knowland was deeply hostile to Communist China. If Taft doesn't end the Korean War before he dies, Knowland might very well escalate the fighting and try to bring in the Nationalist Chinese.
He will likely still appoint Earl Warren as Chief Justice and otherwise follow a domestic policy similar to Eisenhower, though he will likely support the Bricker Amendment, make a stronger push for civil rights than Ike did and be more hostile to labor unions.