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)(21,22,28,32)(23,33,36,29)(24,25,26,30)(27,34,35,31)(1,2,4,3)(21,23,28,36)(22,29,32,33)(24,31,26,34)(25,35,30,27)(5,7)(6,11)(8,13)(9,14)(10,15)(12,19)(16,17)(18,20)(21,24,28,26)(22,30,32,25)(23,34,36,31)(27,29,35,33)(5,8,10,11)(6,7,13,15)(9,16,18,19)(12,14,17,20)(21,25)(22,24)(23,35)(26,32)(27,36)(28,30)(29,31)(33,34)(1,3,4,2)(5,7)(6,8)(9,14)(10,15)(11,13)(12,16)(17,19)(18,20)(21,26,28,24)(22,30,32,25)(23,34,36,31)(27,33,35,29)(5,9,10,18)(6,12,13,17)(7,14,15,20)(8,16,11,19)(21,27,28,35)(22,31,32,34)(23,25,36,30)(24,29,26,33)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.