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