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