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