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