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