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