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