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