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