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