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