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