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