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