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