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