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