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