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