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