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