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