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)(17,18,23,21)(19,24,28,22)(20,29,31,25)(26,30,27,32)(2,7)(3,4)(11,15)(13,16)(17,19)(18,24)(20,27)(21,22)(23,28)(25,30)(26,31)(29,32) involution — undirected(1,3,6,4)(2,8,7,5)(9,10)(11,13)(12,14)(15,16)(17,20)(18,25)(19,26)(21,29)(22,30)(23,31)(24,32)(27,28)(1,4,6,3)(2,5,7,8)(9,11)(10,13)(12,15)(14,16)(17,21,23,18)(19,24,28,22)(20,29,31,25)(26,32,27,30)(1,5)(2,3)(4,7)(6,8)(9,10)(11,13)(12,14)(15,16)(17,20)(18,25)(19,27)(21,29)(22,32)(23,31)(24,30)(26,28) involution — undirected(17,22,23,24)(18,19,21,28)(20,30,31,32)(25,26,29,27)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.