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