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