One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,6)(5,7)(9,10,15,14)(11,12,13,16)(17,18,21,25,22,26,19,23)(20,28,29,31,30,24,27,32)(1,3,5,4)(2,6,7,8)(9,11,15,13)(10,16,14,12)(17,19,22,21)(18,23,26,25)(20,29,30,27)(24,32,28,31)(1,4,5,3)(2,6,7,8)(9,12,15,16)(10,11,14,13)(18,23)(19,21)(24,31)(25,26)(27,29)(28,32)(9,13,15,11)(10,16,14,12)(17,20,22,30)(18,24,26,28)(19,27,21,29)(23,31,25,32)(9,14,15,10)(11,12,13,16)(20,30)(24,28)(27,29)(31,32)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.