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