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