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