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