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