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