You definitely don't wanna sprint on your leg days.
Kelly Bagget seem to know his shit when it comes to speed development and leg strength training. He recommends strength training the legs on one day, like a mon, and doing speed and plyo work on another, like thur or fri.
Unless your cycling, I dont see how your gonna avoid overtraining your legs doing sprint work and leg strength work on the same day. Either way, whatever workout comes second with be hampered.
You would be best of hitting sprints on an off day, or do them on a press day. From my experience, Ive found I can sprint fine on press days, but pulling muscles are used more in sprinting(my experince), so if I gotta work out and sprint in one day, I do it on press days.