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