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