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