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