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