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