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