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