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