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