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