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