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