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