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