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