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