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