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