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