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)(21,22,27,28,26,32,25,31)(23,33,34,36,35,29,24,30)(5,6,9,10)(7,11,8,12)(13,15,17,16)(14,18,19,20)(22,28)(23,34)(24,35)(25,27)(29,33)(31,32)(5,7,9,8)(6,11,10,12)(13,16,17,15)(14,18,19,20)(21,23,27,34,26,35,25,24)(22,29,28,30,32,33,31,36)(2,4)(5,8,9,7)(6,11,10,12)(21,24,25,35,26,34,27,23)(22,30,31,29,32,36,28,33)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.