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