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