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