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