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