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