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