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