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