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