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