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