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)(19,25)(20,27)(21,29)(22,23)(24,31)(26,28)(30,32) involution — undirected(2,3)(4,8)(9,10,13,14)(11,15,16,12)(17,19,22,27)(18,20,23,25)(21,30,31,26)(24,32,29,28)(1,2,5,3)(4,6,8,7)(9,11)(10,12)(13,16)(14,15)(18,23)(20,25)(24,29)(28,32)(2,3)(6,7)(9,12)(10,11)(13,15)(14,16)(17,20,22,25)(18,19,23,27)(21,28,31,32)(24,26,29,30)(1,3,5,2)(4,7,8,6)(9,10)(11,12)(13,14)(15,16)(17,19)(18,20)(21,26)(22,27)(23,25)(24,28)(29,32)(30,31)(1,4,5,8)(2,6,3,7)(9,12)(10,11)(13,15)(14,16)(17,21)(18,24)(19,26)(20,28)(22,31)(23,29)(25,32)(27,30)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.