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