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