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