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