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