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