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