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