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)(17,18,22,25)(19,23,27,31)(20,29,24,21)(26,28,30,32)(1,2,6,3)(4,7,5,8)(9,11,12,16)(10,13,14,15)(17,19)(18,23)(20,30)(21,28)(22,27)(24,26)(25,31)(29,32)(1,3,6,2)(4,7,5,8)(11,16)(13,15)(17,20,21,18,22,24,29,25)(19,26,28,31,27,30,32,23)(1,4,6,5)(2,7,3,8)(10,14)(13,15)(17,19)(18,23)(20,30)(21,28)(22,27)(24,26)(25,31)(29,32)(1,5,6,4)(2,7,3,8)(19,27)(23,31)(26,30)(28,32)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.