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