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