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