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