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