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