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