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