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