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)(11,13)(12,14)(15,16)(18,22)(19,25)(20,28)(23,27)(26,31)(30,32) involution — undirected(1,3)(2,5)(4,8)(6,7)(9,11)(10,13)(12,15)(14,16)(17,18,21,22)(19,25,27,23)(20,29,28,24)(26,31,30,32)(10,14)(11,15)(17,19,18,23,21,27,22,25)(20,30,24,32,28,26,29,31)(2,6)(5,7)(17,20)(18,24)(19,26)(21,28)(22,29)(23,31)(25,32)(27,30) involution — undirected(3,8)(5,7)(11,15)(13,16)(19,27)(20,28)(23,25)(24,29) 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.