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)(11,13)(12,14)(15,16)(17,18,20,25,21,24,29,30)(19,23,27,31,26,32,28,22)(9,11)(10,13)(12,15)(14,16)(17,19,21,26)(18,22,24,31)(20,28,29,27)(23,25,32,30)(2,5)(6,8)(11,15)(13,16)(17,19)(18,23)(20,27)(21,26)(22,30)(24,32)(25,31)(28,29) involution — undirected(11,15)(13,16)(19,26)(22,31)(23,32)(27,28) involution — undirected(1,3,4,7)(2,6,5,8)(10,14)(13,16)(18,24)(22,31)(23,32)(25,30)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.