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