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