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