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