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