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