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