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