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