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