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