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