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