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