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