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