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