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