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