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