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