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