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