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