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