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