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