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