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