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