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