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