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