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