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