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