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