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