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)(11,15)(12,16)(13,14)(17,18,22,25)(19,23,26,30)(20,21,24,29)(27,28,31,32)(3,8)(6,7)(9,10,13,14)(11,15,16,12)(17,19)(18,23)(20,27)(21,28)(22,26)(24,31)(25,30)(29,32)(1,3,5,8)(2,6,4,7)(9,11)(10,12)(13,16)(14,15)(19,26)(20,24)(21,29)(23,30)(3,8)(6,7)(9,12)(10,11)(13,15)(14,16)(17,20)(18,21)(19,27)(22,24)(23,28)(25,29)(26,31)(30,32) involution — undirected(1,3)(2,7)(4,6)(5,8)(9,10)(11,12)(13,14)(15,16)(17,21)(18,24)(19,28)(20,25)(22,29)(23,31)(26,32)(27,30) involution — undirected(1,4,5,2)(3,6,8,7)(9,12)(10,11)(13,15)(14,16)(17,19)(18,23)(20,27)(21,28)(22,26)(24,31)(25,30)(29,32)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.