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)(23,28,32,35)(24,29,34,36)(25,33,31,30)(5,7,9,15)(6,10,12,13)(8,14,16,20)(11,17,18,19)(21,23,27,32)(22,28,26,35)(24,33,34,30)(25,29,31,36)(2,4)(5,8,9,16)(6,11,12,18)(7,14,15,20)(10,17,13,19)(21,24)(22,29)(23,31)(25,32)(26,36)(27,34)(28,30)(33,35)(6,12)(10,13)(11,18)(17,19)(21,22,27,26)(23,28,32,35)(24,29,34,36)(25,33,31,30)(7,15)(10,13)(14,20)(17,19)(21,25,27,31)(22,30,26,33)(23,24,32,34)(28,36,35,29)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.