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