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