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