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