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