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