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