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