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