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