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