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