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