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