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