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