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