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