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