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