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