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