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