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