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