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