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