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