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