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