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