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