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