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