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