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