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