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