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