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