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