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