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