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)(21,22,26,27)(23,28,32,35)(24,33,31,29)(25,30,34,36)(5,7,9,15)(6,10,11,13)(8,16,17,14)(12,20,19,18)(21,23,26,32)(22,28,27,35)(24,30,31,36)(25,33,34,29)(2,4)(21,24,26,31)(22,29,27,33)(23,25,32,34)(28,36,35,30)(6,11)(10,13)(12,19)(18,20)(21,22,26,27)(23,28,32,35)(24,33,31,29)(25,30,34,36)(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)(27,36)(28,29)(33,35)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.