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