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