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)(11,15)(12,13)(14,16)(17,18,21,20)(19,23,24,22)(25,26,29,28)(27,31,32,30)(2,4)(3,8)(10,12)(11,16)(17,19,21,24)(18,22,20,23)(27,32)(30,31)(2,4)(6,7)(9,11)(10,14)(12,15)(13,16)(17,19)(18,23)(20,22)(21,24)(25,27)(26,30)(28,31)(29,32) involution — undirected(1,3,5,8)(2,6,4,7)(9,11)(10,14)(12,15)(13,16)(17,19)(18,23)(20,22)(21,24)(25,28,29,26)(27,31,32,30)(1,4,5,2)(3,6,8,7)(9,12,13,10)(11,14,16,15)(17,20,21,18)(19,23,24,22)(25,27)(26,30)(28,31)(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.