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