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