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