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