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