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