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