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