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)(17,18,22,26)(19,23,27,24)(20,28,30,32)(21,31,29,25)(2,6)(7,8)(9,11)(10,14)(12,15)(13,16)(17,19,22,27)(18,23,26,24)(20,21,30,29)(25,28,31,32)(9,12,13,10)(11,15,16,14)(17,20,29,19,22,30,21,27)(18,24,31,32,26,23,25,28)(1,3,5,4)(2,7,6,8)(11,16)(14,15)(17,20,21,27,22,30,29,19)(18,24,25,28,26,23,31,32)(1,4,5,3)(2,7,6,8)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.