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