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