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)(13,14)(15,19)(16,18)(17,20)(21,22,26,29)(23,24,31,27)(25,33,36,28)(30,35,34,32)(8,12)(10,11)(13,14)(15,19)(16,18)(17,20)(21,23,26,31)(22,27,29,24)(25,34,36,30)(28,32,33,35)(6,7)(10,11)(13,14,16,18)(15,17,20,19)(21,24)(22,23)(25,35)(26,27)(28,34)(29,31)(30,33)(32,36)(1,2,3,4)(5,7,9,6)(8,11,12,10)(13,14)(15,17)(16,18)(19,20)(21,23)(22,24)(25,30)(26,31)(27,29)(28,32)(33,35)(34,36)(5,8,9,12)(6,10,7,11)(13,15,16,20)(14,17,18,19)(21,25,26,36)(22,28,29,33)(23,30,31,34)(24,32,27,35)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.