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