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