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