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