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