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