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