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