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