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