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