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