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