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