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