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