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