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