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