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