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