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