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)(17,18,20,24,22,26,21,25)(19,23,29,31,28,27,30,32)(9,11)(10,13)(12,16)(14,15)(17,19,21,30,22,28,20,29)(18,23,25,32,26,27,24,31)(1,2,3,4)(6,8)(11,16)(13,15)(17,18,20,24,22,26,21,25)(19,27,29,32,28,23,30,31)(10,14)(13,15)(19,28)(23,27)(29,30)(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.