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