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