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