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