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