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