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