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