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