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