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