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