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