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