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