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