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