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