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