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