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