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