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