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