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