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