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