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