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