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