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