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