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