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