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