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)(20,30)(21,26)(22,27)(23,29)(25,28)(31,32) involution — undirected(1,2,5,4)(3,6,7,8)(9,10,14,12)(11,16,13,15)(17,19,22,29)(18,23,27,24)(20,21,28,31)(25,26,30,32)(2,4)(6,8)(9,10,14,12)(11,15,13,16)(17,19,22,29)(18,24,27,23)(20,21,28,31)(25,32,30,26)(3,7)(6,8)(9,11,14,13)(10,15,12,16)(17,20)(18,25)(19,21)(22,28)(23,26)(24,32)(27,30)(29,31)(1,3)(2,6)(4,8)(5,7)(9,12,14,10)(11,15,13,16)(17,21)(18,26)(19,28)(20,29)(22,31)(23,30)(24,25)(27,32)(1,4,5,2)(3,8,7,6)(9,13,14,11)(10,15,12,16)(17,18)(19,23)(20,25)(21,26)(22,27)(24,29)(28,30)(31,32)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.