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