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