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