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