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