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)(18,22)(19,24)(25,26)(27,31)(28,29)(30,32) involution — undirected(1,2)(3,8)(4,5)(6,7)(9,11,14,12)(10,15,16,13)(17,18)(19,23)(20,24)(21,22)(25,26,29,28)(27,31,32,30)(3,7)(6,8)(10,16)(11,12)(18,22)(20,23)(25,27,29,32)(26,30,28,31)(1,2)(3,6)(4,5)(7,8)(9,12,14,11)(10,15,16,13)(17,19)(18,23)(20,22)(21,24)(25,28,29,26)(27,30,32,31)(1,3,4,7)(2,6,5,8)(9,13,14,15)(10,11,16,12)(17,20,21,23)(18,19,22,24)(25,27)(26,31)(28,30)(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.