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