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