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