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