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