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