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