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