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