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