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