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