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