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)(19,24)(20,26)(21,27)(22,25)(23,28)(29,31)(30,32) involution — undirected(1,2,5,6)(3,8,4,7)(9,10)(11,15)(12,14)(13,16)(17,19)(18,24)(20,21)(22,29)(23,30)(25,31)(26,27)(28,32)(9,11)(10,13)(12,16)(14,15)(18,25)(20,29)(21,22)(24,31)(26,32)(27,28) involution — undirected(1,3,5,4)(2,7,6,8)(11,16)(13,15)(17,20,23,29)(18,26,28,31)(19,21,30,22)(24,27,32,25)(1,4,5,3)(2,7,6,8)(10,14)(13,15)(17,21,23,22)(18,27,28,25)(19,29,30,20)(24,31,32,26)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.