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