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