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