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