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