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