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