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