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