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