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