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