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