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