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