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