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)(15,19)(18,20)(21,22,27,24)(23,25,31,28)(26,29,34,32)(30,33,36,35)(6,7)(8,12)(14,17)(18,20)(21,23,27,31)(22,28,24,25)(26,30,34,36)(29,35,32,33)(5,6,9,7)(8,11,12,10)(13,14,16,17)(15,18,19,20)(21,24,27,22)(23,28,31,25)(26,29,34,32)(30,33,36,35)(1,2)(3,4)(5,7,9,6)(8,11,12,10)(21,25,27,28)(22,23,24,31)(26,33,34,35)(29,30,32,36)(5,8)(6,10)(7,11)(9,12)(13,15)(14,18)(16,19)(17,20)(21,26,27,34)(22,29,24,32)(23,30,31,36)(25,33,28,35)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.