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