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