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