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