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