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