One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10,14,15,13,11,12,16)(17,18,23,31,22,27,21,26)(19,24,28,32,20,30,29,25)(2,5)(6,8)(9,11,14,16,13,10,12,15)(17,19)(18,24)(20,22)(21,29)(23,28)(25,26)(27,30)(31,32)(1,3)(2,6)(4,7)(5,8)(9,11,13,10)(12,16,14,15)(17,20,22,19)(18,25,27,32)(21,29,23,28)(24,31,30,26)(3,7)(6,8)(9,12,13,14)(10,15,11,16)(17,21,22,23)(18,26,27,31)(19,28,20,29)(24,32,30,25)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.