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