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