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