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