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