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