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