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