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