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