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