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