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