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