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