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