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