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