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