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