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