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