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)(13,14,17,19)(15,16,20,18)(21,22)(23,28)(24,32)(25,30)(26,27)(29,34)(31,36)(33,35)(5,6,8,9)(7,11,12,10)(13,15)(14,18)(16,19)(17,20)(22,27)(25,35)(28,36)(29,32)(6,9)(10,11)(13,16,17,18)(14,15,19,20)(21,23)(22,28)(24,33)(25,29)(26,31)(27,36)(30,34)(32,35)(1,2,3,4)(5,6)(7,10)(8,9)(11,12)(13,16)(14,15)(17,18)(19,20)(21,24,26,34)(22,29,27,32)(23,30,31,33)(25,28,35,36)(5,7)(6,10)(8,12)(9,11)(13,14)(15,16)(17,19)(18,20)(21,25,26,35)(22,30,27,33)(23,29,31,32)(24,28,34,36)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.