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