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