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