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)(13,14,17,18)(15,20,16,19)(21,22)(23,29)(24,32)(25,26)(27,30)(28,33)(31,34)(35,36)(5,6,9,10)(7,11,12,8)(14,18)(15,16)(22,26)(23,30)(28,32)(31,36)(7,12)(8,11)(13,15,17,16)(14,19,18,20)(21,22)(23,29)(24,32)(25,26)(27,30)(28,33)(31,34)(35,36)(1,2,3,4)(5,7)(6,8)(9,12)(10,11)(13,16,17,15)(14,19,18,20)(21,23)(22,27)(24,31)(25,30)(26,29)(28,34)(32,35)(33,36)(5,8)(6,7)(9,11)(10,12)(13,14)(15,20)(16,19)(17,18)(21,24,25,33)(22,28,26,32)(23,31,30,36)(27,34,29,35)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.