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