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