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