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