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