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