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)(11,14)(12,16)(13,15)(17,18,21,22)(19,23,27,26)(20,24,29,28)(25,30,31,32)(2,5)(6,8)(9,11,13,12)(10,14,15,16)(18,22)(19,23)(20,28)(24,29)(25,31)(26,27)(9,12,13,11)(10,14,15,16)(17,19)(18,23)(20,25)(21,27)(22,26)(24,30)(28,32)(29,31)(17,20,21,29)(18,24,22,28)(19,25,27,31)(23,30,26,32)(1,3,4,7)(2,6,5,8)(17,18,21,22)(19,26,27,23)(20,24,29,28)(25,32,31,30)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.