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