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