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