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