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