One vertex per element, one color per generator, with an edge from x to x·s.
(2,3)(5,6)(7,13)(8,20)(9,23)(10,14)(11,22)(12,15)(16,17)(18,29)(19,31)(21,32)(24,25)(26,28)(27,30)(33,36)(34,35) involution — undirected(1,2,4,3)(5,7)(6,13)(8,21)(9,17)(10,27)(11,18)(12,19)(14,30)(15,31)(16,23)(20,32)(22,29)(24,33)(25,36)(26,35)(28,34)(5,8,20,6,11,23,26,14,12,24,25,15,10,28,9,22)(7,16,32,30,18,33,35,31,19,34,36,29,27,21,17,13)(1,3,4,2)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.