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