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