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