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