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