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