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)(21,22,26,25)(23,27,31,30)(24,32,34,28)(29,36,33,35)(6,7)(10,11)(13,14)(15,17)(16,18)(19,20)(21,23,26,31)(22,27,25,30)(24,33,34,29)(28,36,32,35)(6,7)(10,11)(14,15)(18,19)(21,24,26,34)(22,28,25,32)(23,29,31,33)(27,35,30,36)(1,3,4,2)(5,7,9,6)(8,11,12,10)(13,15,17,14)(16,19,20,18)(21,23)(22,27)(24,29)(25,30)(26,31)(28,35)(32,36)(33,34)(5,8,9,12)(6,10,7,11)(13,16)(14,18)(15,19)(17,20)(21,25,26,22)(23,30,31,27)(24,32,34,28)(29,36,33,35)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.