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