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)(19,25)(20,30)(21,23)(22,26)(24,27)(28,31)(29,32) involution — undirected(1,2,5,4)(3,6,8,7)(9,10)(11,14)(12,15)(13,16)(17,19,24,21)(18,25,27,23)(20,29,22,28)(26,31,30,32)(1,3)(2,6)(4,7)(5,8)(9,11)(10,13)(12,16)(14,15)(17,20,24,22)(18,26,27,30)(19,28,21,29)(23,31,25,32)(1,3,5,8)(2,6,4,7)(9,10)(11,13)(12,15)(14,16)(17,21,24,19)(18,23,27,25)(20,28,22,29)(26,32,30,31)(1,3)(2,7)(4,6)(5,8)(9,11)(10,14)(12,16)(13,15)(17,22,24,20)(18,26,27,30)(19,29,21,28)(23,31,25,32)(1,4,5,2)(3,7,8,6)(9,10)(11,13)(12,15)(14,16)(17,23)(18,19)(20,31)(21,27)(22,32)(24,25)(26,28)(29,30)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.