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