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