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