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