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