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