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