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