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