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