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