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