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