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