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