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