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