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