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