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