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