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