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