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