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