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