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