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