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