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