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