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