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