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