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