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