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