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