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