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