A rough guess, immagining a (relatively) competitive race :
Taft : 39%, 286 EVsWilson : 32%, 181 EVsRoosevelt : 26%, 71 EVsDebs : 1%
Taft polls extremely well in the libertarian West, and also gets good results in the Northeast. Even though he doesn't reach McCain's levels in the South, he easily carries most of the States there. Wilson's moderately-progressive rhetoric attracts the Southwest, and he polls reasonably well in the Norhteast and in the outer South. Roosevelt is too radical to gather much support outside the most liberal States and States with a populist leaning like WV.
