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