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