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