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