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