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