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