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