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