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