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