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