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