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