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