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