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