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