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