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