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