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