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