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