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