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