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