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