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