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