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