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