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