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