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