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