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