people train calves on back days, but i dont think you could train other parts different days, since squats gets like the whole thing, so you might not want to do that.
or you can do what i do, which is
monday: squat, deads(stiff leg and regular), bench(flat, incline, decline)
Tuesday: abs, backextensions, dips, pullups
wednesday: seated rows, standing rows, lat pull downs, leg extensions
thursday: flys, peck deck, cable crossovers, leg press
friday: leg curls, military presses, dumbell shrugs, dumbell curls, skull crushers, tricep pulldown
sat/sun: off