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