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