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