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