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