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