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