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