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