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