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