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)(19,26)(20,24)(21,23)(22,29)(25,27)(28,31)(30,32)(1,2,3,4)(9,11)(10,13)(12,15)(14,16)(17,19,27,28,21,30,20,29)(18,22,24,32,23,31,25,26)(5,6,7,8)(11,15)(13,16)(18,23)(22,31)(24,25)(26,32)(2,4)(18,24)(19,28)(20,27)(22,31)(23,25)(29,30) 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.