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