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