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