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