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