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