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