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