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