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