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