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