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