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