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