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