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