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