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