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