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