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