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