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