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