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