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