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