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