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