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