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