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