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