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