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)(11,15)(12,16)(13,14)(17,18)(19,21)(20,24)(22,25)(23,26)(27,32)(28,31)(29,30) involution — undirected(1,3,5,4)(2,6,8,7)(9,10)(11,16)(12,15)(13,14)(17,18,21,25,23,26,22,19)(20,28,32,27,31,24,30,29)(1,3,5,4)(2,7,8,6)(10,14)(15,16)(17,19,21,18,23,25,22,26)(20,29,32,28,31,27,30,24)(9,11,13,12)(10,15,14,16)(17,20,23,31)(18,24,26,28)(19,27,25,29)(21,32,22,30)(1,4,5,3)(2,6,8,7)(9,12,13,11)(10,15,14,16)(17,21,23,22)(18,25,26,19)(20,30,31,32)(24,27,28,29)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.