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