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)(11,16)(12,13)(14,15)(17,18,21,23)(19,20,24,22)(25,26,29,27)(28,31,32,30)(2,6)(3,7)(9,11)(10,13)(12,14)(15,16)(17,19)(18,22)(20,23)(21,24)(25,27,29,26)(28,31,32,30)(3,7)(4,8)(11,12)(13,16)(18,23)(19,24) involution — undirected(1,3)(2,4)(5,7)(6,8)(9,12,14,11)(10,13,15,16)(17,20)(18,19)(21,22)(23,24)(25,28)(26,30)(27,31)(29,32)(1,4)(2,3)(5,8)(6,7)(9,13)(10,11)(12,15)(14,16)(17,18)(19,20)(21,23)(22,24) 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.