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