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