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