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