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