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)(9,12)(10,19)(11,15)(14,17)(18,20)(21,22,24,28,25,29,33,27)(23,26,32,35,31,34,30,36)(5,7,8,18,11,17,10,9)(6,12,19,14,15,20,13,16)(21,23,24,32,25,31,33,30)(22,26,28,35,29,34,27,36)(2,4)(5,8,11,10)(6,13,15,19)(7,9,17,18)(12,14,20,16)(22,27)(23,30)(24,33)(26,34)(28,29)(31,32)(5,9,10,17,11,18,8,7)(6,14,13,12,15,16,19,20)(23,31)(26,34)(30,32)(35,36)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.