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