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