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