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