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