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