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