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