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)(15,17)(16,18)(19,20)(21,22,24,27)(23,29,32,36)(25,34,31,28)(26,35,30,33)(1,2,3,4)(6,9)(10,12)(13,15,16,19)(14,17,18,20)(21,22)(23,30)(24,27)(25,28)(26,32)(29,35)(31,34)(33,36)(2,4)(7,11)(10,12)(21,23,31,35,24,32,25,33)(22,26,34,36,27,30,28,29)(5,7,8,11)(6,10,9,12)(14,18)(17,20)(22,27)(23,32)(28,34)(33,35)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.