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