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