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