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