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