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