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