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