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