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