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