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