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