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