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