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