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