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