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