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