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