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