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