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