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