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